Fixing device for helmets



FIG. 1 is a perspective view of a fixing device for helmets, showing the new ornamental design;

FIG. 2 is a front view of the fixing device of FIG. 1 ;

FIG. 3 is a back view of the fixing device of FIG. 1 ;

FIG. 4 is a left side view of the fixing device of FIG. 1 ;

FIG. 5 is a right side view of the fixing device of FIG. 1 ; and,

FIG. 6 is a top view of the fixing device of FIG. 1 .

The broken lines in the drawings depicting the shell of a helmet represent environmental subject matter that forms no part of the claimed design. 

CLAIM The ornamental design for a fixing device for helmets, as shown and described. 